Keep prepared-route in-history append, clear-all, and normalization semantics while adopting named persona prefix/suffix and late environment facts from master. Resolve documentation against the derived system-message history and retain the existing strict migration behavior.
Preserve system/message persistence while adopting named persona prefix/suffix and environment facts after reusable instructions. Resolve the Web assertion against the logged system message, not retired header.system. Keep the existing protected V3 integration PR as the root publication path; no rules are bypassed.
Regenerate only native V3 Session/output oracles through the shipped headless and SDK profiles. These outputs retain system-message admission before users, bind request metadata before title fallback, and record real V3 delivery acknowledgments. Historical V0/V1/V2 replay inputs remain unchanged; pinned scenarios keep separate writer outputs.
The upper headless/SDK refresh covered109 cases; the only initial failure used macOS system Python3.9 for the PTC Python scenario, which passed with the declared CPython3.14 PATH. No assertion or runtime behavior was changed to accommodate it.
Synchronous admission finalization moves the first request/header to seq10 before the deferred title. Read that actual header rather than seq11 request/context so the spill scenario exercises a large canonical request record. Keep the inherited dynamic-locator verification and independent file-content oracle; the test now requires a real successful read and SPILL_CANONICAL_OK rather than recording shell failure.
Validation: targeted built refresh and subsequent read-only replay both pass with complete spilled JSON equal to the live request/header and the session_event_search schema present.
Restore all 147 historical canonical fixtures changed by the lower branch to exact shared base 220ff708e3628a9be46d9747d09af6d8cd742f0d bytes (145 V2 and two V0). All 180 committed V0/V1/V2 canonical files now have zero diff against that base, including unchanged Python, test-support and preview sources.
Preserve corrected lower writer bodies in 146 V3 successors across 119 owner directories: replace 135 unreleased V3 counterparts and add 11 siblings. Change only each copied Session header version; preserve all body bytes, raw model streams, inline images, IDs, references and historical delivery generation markers. Remove two unshipped V2 additions after creating their V3 sibling: record-suite/rec-pin and empty-response-retry-current.
Keep six explicitly historical snapshot owners pinned with no V3 sibling. Restore the two pre-step V0 record child sources without synthesizing current output. Fix seven embedded Session header versions in exactly five test-support behavior owners whose output filenames already select V3. Leave protocol expectations, shared references, sidecars, consumer scripts and production migration/normalization code untouched.
Validation: purpose-built temporary Python inventory and verifier checked 337 canonical headers, 3714 successor JSON rows, message roles, contiguous child roles, exact successor bodies, all 180 historical base bytes and zero git diff, noncanonical JSONL immutability, six retained owners and six unchanged preview fixtures. git diff --cached --check passed. Temporary generators removed. Strict migration, native refresh and replay remain pending parent integration; unsupported pre-step sources are reported separately.
Replace the replay's fixed temporary-root find command with the existing fromRequest capture of the preceding session_event_read result. Quote the exact returned file and use portable grep -Fq/printf checks; emit SPILL_CANONICAL_OK only after request/header and session_event_search are present. Preserve the owning layer's seq11 request/header target.
Before cleanup or fixture refresh, require both successful tool results and the exact verification marker, read the returned spill file independently, and compare its complete JSON to the live request/header event. This prevents accepting a failed verification transcript or an unrelated/incomplete spill after event ordering changes. No runtime or error-text normalization changes.
Evidence: nonexistent recorded-root negative control fails at the marker assertion (bash exit 2 still carries isError:false). Focused keyless refresh, read-only source replay, built-profile replay, corpus ownership guard, and focused driver lint pass. Host/client library builds pass. Portable POSIX command reviewed; Linux CI remains the platform confirmation.
Consolidate the representation-change PR and its rebase reconciliations into one baseline. Preserve the exact tree and keep the in-history feature in the dependent PR. Follow-up fixes remain separate.
Tianyi Cui